html,body{width:100%;height:100%;margin:0;padding:0;}
html, body, * {font: 14px/1.5 arial,"Microsoft Yahei","Hiragino Sans GB",sans-serif;color:#4d555d;}
input,textarea,select{outline:none;}
li{list-style-type: none;}
a{text-decoration: none;display: block;outline:none;}
a:hover{text-decoration: none;}
a:visited{text-decoration: none;}
a:link{text-decoration: none;}
a:focus{outline:none;}
.clearfix {clear: both;}
.clearfix:before,.clearfix:after {display: table; line-height: 0; content: ""; }
.clearfix:after {clear: both;}
.relative{position:relative;}
.hidden{display:none;}
.center-block{margin-left:auto;margin-right:auto;}
.color-fff{color:#FFF}
.wrap-h{height: 100%;}
.f-16{font-size: 16px;}
.popover .arrow{display:none;}
.mt-50{margin-top: 50px;}
.mt-10{margin-top: 10px;}
.mt-15{margin-top: 15px;}
.mt-20{margin-top: 20px;}
.mt-30{margin-top: 30px;}
.mt-40{margin-top: 40px;}
.mb-5{margin-bottom:5px;}
.mb-10{margin-bottom:10px;}
.mb-20{margin-bottom:20px;}
.os-color{color:#1e9bdd;}
.os-color-hover:hover{color: #1e9bdd;}
.link-a{color:#4d555d;text-decoration: none;}
.link-a:HOVER{color: #1e9bdd;}
.ellipsis{display:block;white-space:nowrap; overflow:hidden; text-overflow:ellipsis;}
.alert-info{color:#31708f;background-color:#d9edf7;height:30px;padding:5px 10px 5px 10px;border:none;}
.split-line{
	width:100%;
	height: 1px;
	border-bottom: 1px solid #f6f6f6;
	margin: 40px 0px;
}
.btn{
	width: 80px;
	background-color: #1e9bdd;
	text-align: center;
	color: #FFF;
	border-radius:4px;
}
.btn:hover{
	color: #FFF;
}
.os-ul{
	padding:10px 10px 10px 20px;
}
.os-ul li{
	margin: 8px 0px;
}
.os-ul li a{
	color: #888888;
}
.os-ul li a:hover{
	color: #1e9bdd;
}
/*
 * frame
*/
.os-header{
	width: 100%;
	height: 50px;
	background-color:RGB(60,63,65);
	box-shadow: 0 2px 4px 0 rgba(7,17,27,.1);
    transition: .1s all linear;
}
.os-header-box{
	width: 100%;
	max-width: 100%;
	height: 50px;
	line-height:60px;
	transition: .1s all linear;
	box-shadow: 0 2px 4px 0 rgba(7,17,27,.1);
	margin: 0 auto;
}
.logo{
	width: 150px;
	height: 50px;

	background-size: auto 40px;
	float: left;
}
.header-search{
	width:300px;
	heigth:30px;
	line-height:30px;
	border: 1px solid #1e9bdd;
	border-top-left-radius:5px;
	border-bottom-left-radius:5px;
	padding-left:5px;
}
.header-search-btn{
	background-color: #1e9bdd;
	border:1px solid #1e9bdd;
	heigth:30px;
	line-height:30px;
	color: #FFF;
	width:60px;
	margin-left:-4px;
	border-top-right-radius:5px;
	border-bottom-right-radius:5px;
}
.header-nav{
	width: auto;
	height: 30px;
	margin-top: 10px;
	float: left;
}
.header-nav-item{
	float: left;
	width: 100px;
	height: 34px;
	line-height: 34px;
	text-align: center;
	font-size: 16px;
	margin-left: 10px;
	margin-right: 10px;
	color:#000;
}
.header-nav-item:hover{
	border-radius: 3px;
	color: #1e9bdd;
	cursor: pointer;
}
.header-nav-item.cur{
	background-color: rgb(51,147,100);
	border-radius: 3px;
	color: rgb(255,255,255);
}
.header-user{
	width: 152px;
	height: 100%;
	background-color: rgb(80,182,132);
	float: right;
	margin-right: 10px;
	padding-left: 14px;
	padding-top: 13px;
}
.header-user-small{
	width: 152px;
	height: 100%;
	float: right;
	margin-right: 30px;
	padding-left: 14px;
	padding-top: 6px;
}
.avatar-box{
	width: 57px;
	height: 57px;
	float: left;
}
.header-user-avatar{
	width: 57px;
	height: 57px;
	border: 2px #FFF solid;
	border-radius: 50%;
	overflow: hidden;
	z-index: 6;
}
.header-user-avatar img{
	width: 53px;
}
.header-user-info-num{
	position: absolute;
	top: -6px;
	right: -6px;
	width: 24px;
	height: 24px;
	line-height: 20px;
	text-align: center;
	border: 2px #FFF solid;
	border-radius: 50%;
	font-size: 12px;
	color: #FFF;
	background-color: red;
	z-index: 9;
}
.header-user-info-num.open{
	position: absolute;
	top: 64px;
	right: -56px;
}
.header-user-name{
	width: 60px;
	height: auto;
	line-height: 20px;
	float: right;
	margin-top: 6px;
	font-size: 14px;
	color: #FFF;
}
.modal-body{
	width:1200px;
	min-height:500px;
	margin:0 auto;
	margin-top:20px;
	background-color: #FFF;
	border-radius: 5px;
	box-shadow: 0 4px 8px 0 rgba(7,17,27,.1);
	padding-top:40px;
}
.modal-btn{
	width: 80px;
	height:35px;
	line-height:35px;
	background-color: #1e9bdd;
	text-align: center;
	color: #FFF;
	border-radius:4px;
	border:none;
	margin-left: 10px;
	cursor: pointer;
	border:1px solid #1e9bdd;
}

.modal-btn:active{
	border: 1px solid #1e9bdd;
}

.modal-btn-bg{
	background-color: #1e9bdd;
}
.f-footer{
	padding-top:20px;
	width: 100%;
	height: 150px;

}

.f-footer-box{
	width: 1200px;
	margin: 0 auto;
}

.footer-link {
	width:500px;
	padding: 25px 0;
}

.footer-link a {
	margin: 0 10px;
	color: #FFF;
	float:left;
}

.footer-link a:hover {
	text-decoration: underline;
}

.footer-copyright  {
	border-top: 1px solid #d0d6d9;
	padding: 20px 0 25px 10px;
}
.footer-copyright  span{
	color: #FFF
}

.os-main{
	width: 1200px;
	margin:0 auto;
	min-height: 400px;
	margin-top:20px;
	margin-bottom:80px;
}

.index-category{
	width: 1200px;
	height:350px;
}
.index-category-menu {
    width: 240px;
	height:350px;
	position: relative;
	z-index: 2;
	background:#FFF;
	padding-top:20px;
	border-radius: 5px;
}
.index-category-menu .category {
    cursor: pointer;
    position: relative;
    width: 240px;
    height: 35px;
    line-height: 35px;
    overflow: hidden;
    white-space:nowrap; 
    text-overflow:ellipsis;
}
.category-hover{
	background-color:#f6f6f6;
}
.index-category-menu .category a{
	float: left;
	height: 35px;
    line-height:35px;
    color:#4d555d;
}
.index-category-menu .category a:hover{
	text-decoration: underline;
	color:#1296db;
}
.index-category-menu .category:hover{
	background:#f6f6f6;
}

.index-category-menu .category .group{
	height: 35px;
    line-height:35px;
    vertical-align: middle;
    font-weight: bold;
    margin-left:15px;
    margin-right:10px;
}

.index-subcategory{
	background-color:#FFFFFF;
	width: 600px;
	height:350px;
	margin-left:238px;
	position:relative;
	z-index:2;
	top:-350px;
	display: none;
	padding: 30px;
	border-radius:4px;
	box-shadow: 2px 2px 5px #EEE;
}
.index-subcategory .submenu-title{
	font-weight: bold;
	margin-bottom: 5px;
	z-index:2;
}

.index-subcategory .submenu-item{
	display:inline-block;
	margin-bottom: 5px;
}

.submenu-item-span{
	display:inline-block;
	margin:0px 5px;
	font-size:18px;
}

.index-subcategory a{
	color: #000;
}
.index-subcategory a:HOVER{
	color: #1e9bdd;
}

.index-recommd{
	width: 950px;
	height:350px;
	float:right;
}
.index-recommd-item{
	width: 950px;
	height:350px;
	border-radius: 5px;
	position:absolute;
	z-index:1;
}
.recommd-nav-box{
	height: 114px;
	margin: 0 auto;
	position:relative;
	top: 340px;
	z-index:2;
}
.recommd-nav{
	width:960px;
	height: 20px;
	margin-top:-30px;
	text-align: center;
}
.recommd-nav a{
	width: 30px;
	height: 3px;
	background-color:#FFF;
	cursor: pointer;
	margin-left: 10px;
	display: inline-block;
}
.recommd-nav a.cur{
	background-color: #1296db;
}

.course-block{
	width:1200px;
	padding-top:15px;
}

.course-title-block{
	width:100%;
	display: flex;
	flex-direction: row;
}
.course-title{
	font-size: 18px;
	color: #07111b;
	margin-top: 15px;
	line-height: 20px;
	font-weight: bold;
	display: inline-block;
}
.course-content{
	width:1200px;
}
.course-card-item,.course-card-item-up,.course-card-item-scale{
    width: 250px;
    height: 280px;
    border-radius: 5px;
    background-color: #fff;
    box-shadow: 0 4px 4px 0 rgba(7,17,27,.1);
    transition: .2s all linear;
    float: left;
    margin-right: 10px;
    margin-bottom: 20px;
}
.course-card-item:hover{
	box-shadow: 0 4px 4px 0px rgba(18,150,219,.7);
}
.course-card-item-up:hover{
	transform:translateY(-6px);
}
.course-card-item-scale:hover{
	transform:scale(1.03);
}
.course-card-bg {
	width: 250px;
    height: 140px;
    border-top-left-radius: 5px;
    border-top-right-radius: 5px;
}
.course-card-bg span{
	color: #FFF;
	font-weight: bold;
}

.course-card-content {
    background-color: #fff;
    padding: 0px 10px;
    box-sizing: border-box;
}
.course-card-name {
	width: 230px;
    font-size: 14px;
    height:40px;
    line-height:20px;
	overflow: hidden;
	text-overflow: ellipsis;
	font-weight: bold;
}
.course-card-brief{
	width: 230px;
    color: #93999f;
    margin: 10px 0;
    overflow: hidden;
	text-overflow: ellipsis;
	display: -webkit-box;
	-webkit-line-clamp: 2;
	-webkit-box-orient: vertical;
}
.course-card-item p {
    font-size: 12px;
    color: #93999f;
    line-height: 22px;
    margin: 12px 0;
}

.course-card-info {
	width:150px;
	overflow: hidden;
	text-overflow: ellipsis;
    float: left;
    margin: 0;
    font-size: 12px;
}
.course-card-info span{
	margin:0px 5px;
	font-weight: bold;
}
.course-card-price {
    color: #f01414;
}
.free-price{
	color:red;
	font-weight:bold;
	font-size:14px;
	margin-left:2px;
}

.course-content-left {
	float: left;
	width: 224px;
    height: 348px;
    border-radius: 4px;
    margin-right: 20px;
}
.course-card-item-fix{
	width: 224px;
    height: 228px;
    border-radius: 4px;
    box-shadow: 0 4px 8px 0 rgba(7,17,27,.1);
    transition: .3s all linear;
    float: left;
    margin-right: 20px;
    padding-top:20px;
}

.course-card-item-fix .course-card-content {
    padding: 0px 22px;
    color: #FFF;
}

.course-content-right {
    float: left;
    width: 956px;
    height: 348px;
}

.course-content-banner {
    height: 100px;
    margin-bottom: 20px;
}

.course-content-banner-block{
	border-radius:4px;
    float: left;
    width: 468px;
    height: 100px;
    line-height:100px;
    text-align: center;
    color: #FFF;
    font-size: 18px;
    overflow: hidden;
}
.live-item-block{
	width: 400px;
	padding:10px 10px;
	display: flex;
	flex-direction: row;
	border-bottom:1px solid #f6f6f6;
}
.live-item-block .course-header{
	display:inline-block;
	width: 50px;
	height: 50px;
	border-radius:50%;
}
.live-item-block .live-title-block{
	margin-left:10px;
	float:right;
	width: 325px;
	heigth:60px;
	line-height: 60px;
}
.live-title{
	width: 300px;
	margin-top:5px;	
	margin-bottom:5px;
	font-weight: bold;
}
.live-title:hover{
	color: #1e9bdd;
}
/**
*课程章节页面 start
**/
.main-course-left{
	float:left;
	width: 820px;
	min-height:500px;
}
.main-course-right{
	float:right;
	width: 350px;
	min-height:500px;
}
.course-info{
	width:100%;
	min-height: 210px;
	padding-bottom:15px;
	background-color: #fff;
	padding:10px;
	border-radius: 5px;
}
.course-info .course-title {
    margin-bottom: 10px;
    font-size: 16px;
}
.course-brief{
	letter-spacing: 1px;
}
.course-meta{
	margin-top: 10px;
}
.course-meta .static-item {
    display: inline-block;
    padding: 0 33px;
    font-size: 12px;
    border-right: 1px solid #f6f6f6;
}
.course-meta .static-item .meta{
	height:30px;
	line-height:30px;
}
.course-info .static-item .meta-value{
	overflow: hidden;
	max-width: 180px;
	height:30px;
	line-height:30px;
}
.learn-btn {
    display: inline-block;
    border-radius:4px;
    text-align: center;
    background-color: #1e9bdd;
    color: #FFF;
    width: 137px;
    height: 48px;
    line-height:48px;
    font-size: 16px;
    position: relative;
    top:-28px;
}
.learn-btn:hover{
	color: #FFF;
}
.panel{
	background-color: #FFF;
	border-radius:5px;
	padding:10px;
}
.panel-menu, .panel-title{
	width: 100%;
	height:35px;
	line-height:35px;
	padding-left:10px;
	border-bottom:1px solid #f6f6f6;
}
.panel-menu .menu-item{
	font-size:16px;
	font-weight:bold;
	float: left;
	width: 80px;
	display: inline-block;
}
.panel-menu .cur{
	color:#1e9bdd; 
}
.panel-menu span:hover{
	color: #1e9bdd;
}
.chapter {
	padding: 0px 10px 10px 10px;
	border-bottom: 1px solid #f6f6f6;
}
.chapter strong{
	font-size: 14px;
}
.icon-chapter{
	border-radius:50%;
	background-color: #f6f6f6;
	color: #FFF;
	font-weight: bold;
	width: 25px;
	height: 25px;
	line-height: 27px;
	text-align: center;
	font-size: 16px;
	float: left;
	margin-right: 20px;
	margin-top: 2px;
}
.chapter .drop-down{
	float: right;
	margin-top: 2px;
	margin-right: 10px;
}
.chapter-sub{
	margin-left:-20px;
}
.chapter-sub .chapter-sub-li{
	width: 100%;
	height: 40px;
	line-height: 40px;
	margin-top: 3px;
	list-style-type: none;
	padding:0px 10px;
}
.chapter-sub-title-fff{
	color: #FFF;
}
.chapter-sub .chapter-sub-li:hover{
	background-color: #f6f6f6;
	border-radius:5px;
}
.chapter-sub .chapter-sub-li .icon-video{
	margin-right: 10px;
}
.preview-btn{
	height: 25px;
	width: 80px;
	float: right;
	line-height: 25px;
	background-color: #1e9bdd;
	text-align: center;
	color: #FFF;
	margin-top: 8px;
	border-radius:4px;
}
.follow-btn{
	display:inline-block;
	height: 25px;
	width: 60px;
	line-height: 25px;
	background-color: #06B310;
	text-align: center;
	color: #FFF;
	border-radius:4px;
}

/**
*评论-start
**/
.comment{
	padding: 0px 10px 15px 10px;
	border-bottom: 1px solid #f6f6f6;
	margin: 20px 0px;
	min-height: 100px;
}
.comment-header{
	float: left;
	height:40px;
	line-height:40px;
}
.comment-header .user-name{
	margin-top:10px;
	margin-left:10px;
}
.comment-main{
	float: right;
	width: 730px;
	padding-left:10px;
}
.comment-header img{
	width: 40px;
	height: 40px;
	border-radius:50%;
}
.comment-main .comment-content{
	margin-top: 10px;
	width:100%;
}
.comment-main .ref-content{
	margin-top:3px;
	padding: 5px;
	background-color:#f9f9f9;
	border-radius:5px;
}
.comment-main .comment-footer{
	margin-top: 10px;
}
.comment-main .comment-footer a{
	margin-left: 50px;
	display: inline-block;
	color: #93999f;
}
.comment-main .comment-footer a:hover{
	color: #1e9bdd;
}
/**
*评论-end
**/

.video-chapter{
	padding: 0px;
}
.course-video{
	width: 100%;
	height: 503px;
}
.video-li{
	width: 100%;
	height: 30px;
	line-height: 30px;
	list-style-type: none;
	margin-left:20px;
	margin-top:5px;
}
.video-li:hover{
	color: #1e9bdd;
}
.video-course-fix-parent{
	height: 450px;
	margin-top: 0px;
	overflow: hidden;
}
.video-course-fix{
	margin-top:10px;
	height: 450px;
    overflow-x: hidden;
    width: 355px;;    /* 多出26像素是滚动条的位置，会被父容器盖住就看不到了 */
    overflow-y: scroll;
}

/**
*课程章节页面 end
**/

/**
* 课程分类页 start
**/
.course-nav-block{
	background-color: #FFF;
	padding:10px 10px 0px 15px;
	border-radius: 5px;
}
.course-nav-row{
	margin: 0px;
	width:100%;
	padding-top:15px;
}
.course-nav-row .hd{
	float: left;
	font-weight: bold;
	font-size: 14px;
	height: 35px;
	line-height:30px;
}
.course-nav-row .course-nav{
	float: left;
	width: 1090px;
	text-align: left;
	padding:0px;
	padding-left:15px;
}

.course-nav-row .course-nav .course-nav-item{
	float: left;
	margin-right: 20px;
	border-radius:4px;
	margin-bottom: 10px;
}
.course-nav-row .course-nav .cur-course-nav{
	background-color: #1e9bdd;
}
.course-nav-row .course-nav .cur-course-nav a{
	color: #FFF;
}
.course-nav-item a{
	padding:5px 10px;
	color: #4d555d;
}
.course-nav-item a:hover{
	color:#1e9bdd;
	font-size: 14px;
}
/**
*课程分类页 end
**/

/**
*我的主页
**/
.setting-left {
    width: 220px;
    min-height:700px;
    background-color: #FFF;
    float: left;
    text-align: center;
    padding:30px 0px;
    border-radius:5px;
}
.setting-right{
	width: 950px;
	min-height:700px;
	float: right;
	background-color: #FFF;
	padding:30px 0px;
	border-radius:5px;
}
.setting-title{
	margin-left:20px;
}
.setting-header{
	display: block;
    width: 100px;
    height: 100px;
    margin: 0 auto 10px;
    border-radius: 50%;
    border:2px solid #f6f6f6;
}

.user-menu-nav-block{
	text-align:left;
	width: 100%;
	padding:0px;
}
.user-menu-nav-cur{
	background-color: #f6f6f6;
	height: 45px;
	line-height: 45px;
	padding-left:45px;
	padding-right:30px;
	margin-bottom: 10px;
}
.user-menu-nav-cur span{
	float: right;
	display: inline-block;
	height: 45px;
	line-height: 45px;
}

.user-menu-nav{
	height: 45px;
	line-height: 45px;
	padding-left:45px;
	padding-right:30px;
	margin-bottom: 10px;
}
.user-menu-nav:hover{
	background-color: #f6f6f6;
	color: blue;
}
.user-menu-nav span{
	float: right;
	display: inline-block;
	height: 45px;
	line-height: 45px;
}
/**
*我的主页-end
**/

/**
* 表单-start
**/

.os-form{
	padding-left: 20px;
}

.os-form li{
	height: 40px;
	line-height: 40px;
	padding-right:30px;
	margin-bottom: 15px;
	clear: both;
}

.os-form li label{
	width:150px;
	height:40px;
	line-height:40px;
	text-align:center;
	margin-right: 20px;
	background-color: #F3F5F7;
	display: inline-block;
	float: left;
}

.os-form li .display-text{
	float: left;
	height:40px;
	line-height:40px;
	width: 700px;
	padding-left: 20px;
	border-bottom: 1px solid #d9dde1;
}

.os-form li .input-text{
	float: left;
	height:40px;
	line-height:40px;
	width: 300px;
	padding-left: 5px;
	border: 1px solid #d9dde1;
}
.os-form li .input-text2{
	float: left;
	height:40px;
	line-height:40px;
	width: 60%;
	padding-left: 5px;
	border:none;
	border-bottom: 1px solid #d9dde1;
}
.os-form li .input-select{
	float: left;
	height:40px;
	line-height:40px;
	width: 60%;
	padding-left: 5px;
	border: 1px solid #d9dde1;
}

.login-form{
	border: 1px solid #CCC;
	width: 550px;
	margin:10px auto 50px auto;
	padding-top:30px;
	border-radius:5px;
}
.left-label{
	width: 100px;
	text-align: right;
	float:left;
	margin-top:8px;
}
.vercial-label{
	height:36px;
	line-height:36px;
}
.indeity-code{
	width:80px;
	height:33px;
	float:left;
	margin-left:10px;
	border-radius:5px;
}
/**
*form 表单 end
**/

.page-box{
	padding: 40px 0px 0px 25px;
}
.page-box a{
	margin-right: 20px;
}
.page-box .page-num{
	float:left;
	display: inline-block;
	width: 30px;
	height: 30px;
	line-height:30px;
	text-align:center;
	border-radius:50%;
	color: #000;
}
.page-num:hover{
	background-color: #e6e6e6;
	color: #1593d6;
}
.page-cur{
	float:left;
	display: inline-block;
	width: 30px;
	height: 30px;
	line-height:30px;
	text-align:center;
	border-radius:50%;
	background-color: #e6e6e6;
	color: #1593d6;
	font-weight: bold;
}
.page-cur:hover{
	color: #1593d6;
}
.page-next{
	float:left;
	margin-right: 10px;
	display: inline-block;
	line-height:30px;
	text-align:center;
	color: #000;
}
.page-omit{
	float:left;
	display: inline-block;
	width: 30px;
	height: 30px;
	line-height:30px;
	text-align:center;
	color: #000;
	font-size: 16px;
	margin-right: 20px;
	font-weight: bold;
}


/**
*"继续学习"button
**/
.continue-btn{
	display:inline-block;
	width: 80px;
	height:30px;
	line-height:30px;
	border: 1px solid #1e9bdd;
	background-color: #1e9bdd;
	text-align: center;
	color: #fff;
	border-radius:5px;
}
.learn-rate{
	color: #F0145D;
	margin-right: 20px;
}

